// Copyright (C) 2012 Yury Bychenkov (http://bychenkov.com).
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//  - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//  - Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//  - Neither the name of Yury Bychenkov nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef traits_h
#define traits_h

#include "common.h"

template <uint elementSize>
struct FixedSizeElementTraits {
	typedef FixedSizeElementTraits Type;

	static uint sizeOf(const uint8* element);
	static uint safeSizeOf(const uint8* element, uint available);
	static int compare(const uint8* element1, const uint8* element2);
};

struct IntegerTraits {
	typedef IntegerTraits Type;

	static const int64 NULL_VALUE = 0x8000000000000000LL;
	static const uint MAX_ENCODED_SIZE = 9;

	static uint encode(int64 element, uint8* data);
	static uint encodeNull(uint8* data);
	static int64 decode(const uint8* data);

	static uint sizeOf(const uint8* element);
	static uint safeSizeOf(const uint8* element, uint available);
	static int compare(const uint8* element1, const uint8* element2);
};

struct StringTraits {
	typedef StringTraits Type;

	static const uint MAX_OVERHEAD_SIZE = 4;

	static int encode(const uint8* element, uint elementSize, uint8* data, uint dataSize);
	static uint encodeNull(uint8* data);

	static const uint8* decode(const uint8* element, uint& size);

	static uint sizeOf(const uint8* element);
	static uint safeSizeOf(const uint8* element, uint available);
	static int compare(const uint8* element1, const uint8* element2);
	static bool equal(const uint8* element1, const uint8* element2);
};

struct DecimalTraits {
	typedef DecimalTraits Type;

	static const uint MAX_OVERHEAD_SIZE = 1;
	static const uint MAX_ELEMENT_SIZE = 0xFE;

	static int encode(const uint8* element, uint elementSize, uint8* data, uint dataSize);
	static uint encodeNull(uint8* data);

	static const uint8* decode(const uint8* element, uint& size);

	static uint sizeOf(const uint8* element);
	static uint safeSizeOf(const uint8* element, uint available);
	static int compare(const uint8* element1, const uint8* element2);
	static bool equal(const uint8* element1, const uint8* element2);
};

struct TupleTraits {
	typedef TupleTraits Type;

	static uint sizeOf(const uint8* element);
	static uint safeSizeOf(const uint8* element, uint available);
	static int compare(const uint8* element1, const uint8* element2);
	static bool equal(const uint8* element1, const uint8* element2);
};


#include "traits.hpp"

#endif // traits_h
